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5 Written questions

5 Matching questions

  1. if you are pushing against a wall, are you doing work? explain.
  2. What is a lever? list two other examples of a lever.
  3. What is an inclined plane?
  4. example of a wheel and axle.
  5. What is a pulley?
  1. a a simple machine with a straight, slanted surface.
  2. b No. work is only done when the object moves. if the object doesnt move, no matter how much force you put on it, it isnt work.
  3. c a simple machine that has a fulcrum, or pivot point.
  4. d simple machine that is made of a wheel with a groove in it and a rope. it is usually used to life heavy objects.
  5. e turn a door knob (the wheel) the axle moves, to unfasten the door.

5 Multiple choice questions

  1. we need to know the size of the force that was put on the object, and how far the object moved.
  2. a machine made of two or more simple machines. example: scissors, can openers
  3. the rate at which work is done.
  4. P=W / T, the unit Watts
  5. Doorstop. it holds things together.

5 True/False questions

  1. ^ ---> Doing work?Yes

          

  2. What is the scientific meaning of the word "work"?P=W / T, the unit Watts

          

  3. what is a screw?a inclined plane that is wrapped in a spiral, usually on a rod, but not always.

          

  4. ^ <--- Doing work?Yes

          

  5. ^ ^ Doing work?No

          

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